tree c3d82e4a67a1aee7753ef2232b68cc7edb8597c8
parent 959a0e70daa94f7cf76cb27970bb1d7b45e03da2
author Ankur Mittal <anmittal@google.com> 1501025521 -0700
committer Ankur Mittal <anmittal@google.com> 1501696170 -0700

Abstract away update method to support more tools

Abstract away update method inside an interface so that other tools
similar to repo can be supported.

Change-Id: I4964e0f9f89b4a02ce1cd7bb2cdcffb6cf24f585